Active Standard ASTM B972 | Developed by Subcommittee: B01.04
Book of Standards Volume: 02.03
This specification covers nickel-coated copper braid and ribbon flat wire intended for electronic application. Two classes of nickel-coated braid and ribbon flat copper wire are covered: Class A (annealed temper) and Class H (hard-drawn). The material shall be nickel-coated flat wire of such quality and purity that the finished product shall meet the properties and characteristics prescribed in this specification. The specification covers tensile properties, electrical resistivity requirements, permissible variations in thickness, and permissible variations in width.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
1.1 This specification covers nickel-coated copper braid and ribbon flat wire intended for electronic application (Explanatory Note 1).
1.2 Two classes of nickel-coated braid and ribbon flat copper wire are covered as follows:
1.2.1 Class A– Annealed temper.
1.2.2 Class H– Hard-drawn.
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.3.1 Exceptions—The SI values for density, resistivity, and volume are to be regarded as standard.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
B1 Specification for Hard-Drawn Copper Wire
B3 Specification for Soft or Annealed Copper Wire
B49 Specification for Copper Rod Drawing Stock for Electrical Purposes
B193 Test Method for Resistivity of Electrical Conductor Materials
B258 Specification for Nominal Diameters and Cross-Sectional Areas of AWG Sizes of Solid Round Wires Used as Electrical Conductors
Other StandardsNBSHandbook100 Copper Wire Tables
ICS Number Code 29.060.20 (Cables)